Cited by 125Microplastics and Plastic PollutionMarine Biology and Ecology ResearchMicrobial Community Ecology and Physiology

Persistence of plastic debris and its colonization by bacterial communities after two decades on the abyssal seafloor

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Krause, S., Molari, M., Gorb, E. V., Gorb, S. N., Kossel, E., Haeckel, M.·2020·Scientific Reports

Abstract

The fate of plastic debris entering the oceans is largely unconstrained. Currently, intensified research is devoted to the abiotic and microbial degradation of plastic floating near the ocean surface for an extended period of time. In contrast, the impacts of environmental conditions in the deep sea on polymer properties and rigidity are virtually unknown. Here, we present unique results of plastic items identified to have been introduced into deep-sea sediments at a water depth of 4150 m in the eastern equatorial Pacific Ocean more than two decades ago. The results, including optical, spectroscopic, physical and microbial analyses, clearly demonstrate that the bulk polymer materials show no apparent sign of physical or chemical degradation. Solely the polymer surface layers showed reduced hydrophobicity, presumably caused by microbial colonization. The bacterial community present on the plastic items differed significantly (p < 0.1%) from those of the adjacent natural environment by a dominant presence of groups requiring steep redox gradients (Mesorhizobium, Sulfurimonas) and a remarkable decrease in diversity. The establishment of chemical gradients across the polymer surfaces presumably caused these conditions. Our findings suggest that plastic is stable over extended times under deep-sea conditions and that prolonged deposition of polymer items at the seafloor may induce local oxygen depletion at the sediment-water interface.

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  • Plastic material has been found in the ocean that apparently stayed intact in the marine environment for decades.

    “Plastic material was found in the ocean that has apparently stayed intact in the marine environment for decades.125”

    From The fate of plastic in the ocean environment – a minireview (2021) · cites this paper as [125]

  • Intact plastic material was often found in environments conducive for organic matter preservation, e.g. cold or anoxic habitats, and to a lesser degree in warm and oxic environments.

    “Intact plastic material was oen found in environments that are conducive for organic matter preservation, e.g.cold 125 or anoxic habitats 126 (and to a lesser degree in warm and oxic environments).”

    From The fate of plastic in the ocean environment – a minireview (2021) · cites this paper as [125]

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Research works printed but not linked: 4

  1. [15]Grassie, N. & Scott, G. Polymer degradation & stabilization. (Cambridge University Press, 1998).
  2. [26]Laist, D. W. In Marine Debris 99-139 (Springer, 1997).
  3. [32]Wypych, G. Handbook of polymers. (Elsevier, 2016).
  4. [40]Delgado, M. J., Casella, S. & Bedmar, E. J. In Biology of the nitrogen cycle 83–91 (Elsevier, 2007).

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Authors
Krause, S., Molari, M., Gorb, E. V., Gorb, S. N., Kossel, E., & Haeckel, M.
Affiliations
  • GEOMAR Helmholtz Centre for Ocean Research Kiel (DE)
  • Max Planck Society (DE)
  • Christian-Albrechts-Universität zu Kiel (DE)
Corresponding author
Krause, S.
Venue
Scientific Reports
Published
2020-06-11
Volume
10
Issue
1
Pages
9484-9484
ISSN
2045-2322 (ISSN-L)
OpenAlex
W3035237867
Cited by
125
References
97
Citations by year
2026: 15 · 2025: 23 · 2024: 22 · 2023: 17 · 2022: 18 · 2021: 24 · 2020: 6
FWCI
4.01
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Helmholtz Centre for Ocean Research Kiel (GEOMAR) (submittedVersion)
  • Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
Funders
Bundesministerium für Bildung und Forschung (03F0707A)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
  • Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
Keywords
plastic debris, deep-sea sediments, abyssal seafloor, microbial colonization of plastic, bacterial communities, polymer degradation, hydrophobicity, redox gradients, Sulfurimonas, Mesorhizobium, sediment-water interface, oxygen depletion
MeSH terms
Bacteria, Oceans and Seas, Pacific Ocean, Plastics, Seawater, Water Pollutants, Chemical, Geologic Sediments

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